Chapter 41 Certificates

Table 224 Object > Certificate > Trusted Certificates > Edit (continued)

LABEL

DESCRIPTION

Valid From

This field displays the date that the certificate becomes applicable. The text

 

displays in red and includes a Not Yet Valid! message if the certificate has not

 

yet become applicable.

 

 

Valid To

This field displays the date that the certificate expires. The text displays in red

 

and includes an Expiring! or Expired! message if the certificate is about to expire

 

or has already expired.

 

 

Key Algorithm

This field displays the type of algorithm that was used to generate the

 

certificate’s key pair (the ZyWALL uses RSA encryption) and the length of the

 

key set in bits (1024 bits for example).

 

 

Subject Alternative

This field displays the certificate’s owner‘s IP address (IP), domain name (DNS)

Name

or e-mail address (EMAIL).

 

 

Key Usage

This field displays for what functions the certificate’s key can be used. For

 

example, “DigitalSignature” means that the key can be used to sign certificates

 

and “KeyEncipherment” means that the key can be used to encrypt text.

 

 

Basic Constraint

This field displays general information about the certificate. For example,

 

Subject Type=CA means that this is a certification authority’s certificate and

 

“Path Length Constraint=1” means that there can only be one certification

 

authority in the certificate’s path.

 

 

MD5 Fingerprint

This is the certificate’s message digest that the ZyWALL calculated using the

 

MD5 algorithm. You can use this value to verify with the certification authority

 

(over the phone for example) that this is actually their certificate.

 

 

SHA1 Fingerprint

This is the certificate’s message digest that the ZyWALL calculated using the

 

SHA1 algorithm. You can use this value to verify with the certification authority

 

(over the phone for example) that this is actually their certificate.

 

 

Certificate in PEM

This read-only text box displays the certificate or certification request in Privacy

(Base-64) Encoded

Enhanced Mail (PEM) format. PEM uses lowercase letters, uppercase letters

Format

and numerals to convert a binary certificate into a printable form.

 

You can copy and paste the certificate into an e-mail to send to friends or

 

colleagues or you can copy and paste the certificate into a text editor and save

 

the file on a management computer for later distribution (via floppy disk for

 

example).

 

 

Export Certificate

Click this button and then Save in the File Download screen. The Save As

 

screen opens, browse to the location that you want to use and click Save.

 

 

OK

Click OK to save your changes back to the ZyWALL. You can only change the

 

name.

 

 

Cancel

Click Cancel to quit and return to the Trusted Certificates screen.

 

 

41.3.2 The Trusted Certificates Import Screen

Click Object > Certificate > Trusted Certificates > Import to open the Trusted Certificates Import screen. Follow the instructions in this screen to save a trusted certificate to the ZyWALL.

"You must remove any spaces from the certificate’s filename before you can import the certificate.

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ZyWALL USG 100/200 Series User’s Guide